Energy Conservation Potential of Portland Cement Particle Size Distribution Control. Phase 2. Final Report, February 1, 1982-July 31, 1984

摘要

The work described in this report has clearly demonstrated that portland cements made with specific narrow particle size distributions, referred to herein as ''CPSD cement.'' perform as well as or better than ''normally fround'' portland cements in concrete. Methods of optimizing the composition of CPSD cements were developed and refined. CPSD cements with a maximum particle size (upper fifth percentile diameter) or about 30 micrometers were found to be most suitable for general concrete applications. Production of such cements results in a savings of 28% of finish grinding energy, or 13 kWh/ton (0.13 MMBtu/ton fossil fuel equivalent). It was calcualted that complete conversion of the US cement industry to the production of such CPSD cements, on the basis of projected 1984 production levels, would result in the following total annual national energy savings: 1.3 x 10 exp 9 kWh/y of electrical energy (14 x 10 exp 1 aat Btu fossil fuel equivalent; 11 x 10 exp 12 Btu/y of fossil fuels. 28 refs. (ERA citation 11:000836)